VERISIGN INC/CA
S-3, 1999-03-15
COMPUTER PROGRAMMING SERVICES
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<PAGE>
 
     As filed with the Securities and Exchange Commission on March 15, 1999
                                                 Registration No. 333-_________
================================================================================

                     SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C.  20549

                           ______________________

                                  FORM S-3
                           REGISTRATION STATEMENT
                                   Under
                         THE SECURITIES ACT OF 1933

                            ====================

                               VERISIGN, INC.

           (Exact name of Registrant as specified in its charter)

          Delaware                                              94-3221585
(State or other jurisdiction of                              (I.R.S. employer
incorporation or organization)                              identification no.)

                            ====================

                            1350 Charleston Road
                    Mountain View, California  94043-1331
                               (650) 961-7500
             (Address, including zip code, and telephone number,
      including area code, of Registrant's principal executive offices)

                            ____________________

                                Dana L. Evan
                           Chief Financial Officer
                               VeriSign, Inc.
                            1350 Charleston Road
                    Mountain View, California  94043-1331
                               (650) 961-7500
          (Name, address, including zip code, and telephone number,
                 including area code, of agent for service)

                            ____________________

                                 Copies to:

                           Jeffrey R. Vetter, Esq.
                           Tyler R. Cozzens, Esq.
                             Fenwick & West LLP
                            Two Palo Alto Square
                        Palo Alto, California  94306

                            ____________________

 Approximate date of commencement of proposed sale to the public: From time to
  time after the effective date of this Registration Statement until March 20,
     2000 or until the earlier sale of all shares registered hereunder.

          If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [_]
          If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, check the following box. [X]
          If this Form is filed to register additional securities for an
offering pursuant to Rule 462(b) under the Securities Act, please check the
following box and list the Securities Act registration statement number of the
earlier effective registration statement for the same offering. [_] ____________
          If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. [_] _____________
          If delivery of the prospectus is expected to be made pursuant to
Rule 434, please check the following box. [_] _____________________



                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------

                                                                      Proposed Maximum       Proposed Maximum
     Title of Each Class of Securities           Amount to be        Offering Price per     Aggregate Offering        Amount of
             to be Registered                     Registered              Share(1)               Price(1)         Registration  Fee
- ------------------------------------------------------------------------------------------------------------------------------------

<S>                                          <C>                    <C>                    <C>                    <C>
Common Stock, par value $0.001 per share         45,000 shares                $125.125             $5,630,625             $1,565.32
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1) Estimated solely for the purpose of calculating the amount of the
    registration fee, pursuant to Rule 457(c) under the Securities Act, based on
    the average of the high and low prices of the common stock on the Nasdaq
    National Market on March 10, 1999.

                             ====================

     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until this Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.

================================================================================
<PAGE>
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.


SUBJECT TO COMPLETION

MARCH 15, 1999

                                 45,000 SHARES

                                VERISIGN, INC.

                                 COMMON STOCK

                              ___________________

     All of the 45,000 shares of common stock of VeriSign, Inc. are being sold
by a stockholder of VeriSign. VeriSign will not receive any proceeds from the
sale of shares offered by the selling stockholder. See "Selling Stockholder" and
"Plan of Distribution."

     The common stock is listed on the Nasdaq National Market under the symbol
"VRSN." The shares of common stock offered will be sold as described under "Plan
of Distribution."

     On March 12, 1999, the closing price per share of the common stock on the
Nasdaq National Market was $119.75.



                              ___________________

The common stock offered involves a high degree of risk.  See "RISK FACTORS" on
                                    page 3.
                              ___________________
                                        



               The date of this Prospectus is ___________, 1999.

                                       1
<PAGE>
 
                                  THE COMPANY

     VeriSign is the leading provider of Internet-based trust services needed by
websites, enterprises and individuals to conduct trusted and secure electronic
commerce and communications over the Internet, intranets and extranets, or IP
networks. We have established strategic relationships with industry leaders,
including AT&T, British Telecommunications, or BT, Cisco, Microsoft, Netscape,
Network Associates, RSA, Security Dynamics and VISA, to enable widespread
utilization of our digital certificate services and to assure their
interoperability with a wide variety of applications and network equipment. We
have used our secure online infrastructure to issue over 100,000 of our website
digital certificates and over 3.5 million of our digital certificates for
individuals. Our Website Digital Certificate services are used by over 400 of
the Fortune 500 companies. We also offer the VeriSign OnSite service, which
allows an organization to leverage our trusted service infrastructure to develop
and deploy customized digital certificate services for use by its employees,
customers and business partners. Over 300 enterprises have subscribed to the
OnSite service since its introduction in November 1997, including Bank of
America, Hewlett-Packard, the Internal Revenue Service, Kodak, Sumitomo Bank,
Texas Instruments and USWest. We market our Internet-based trust services
worldwide through multiple distribution channels, including the Internet, direct
sales, telesales, value-added resellers, or VARs, systems integrators and our
affiliates, and intend to expand these distribution channels.

     VeriSign was incorporated in Delaware in April 1995. Our executive offices
are located at 1350 Charleston Road, Mountain View, California 94043-1331. Our
telephone number at this location is (650) 961-7500. Our website is located at
http://www.verisign.com. Information contained in our website is not part of
this prospectus.

                                       2
<PAGE>
 
                                 RISK FACTORS

     You should carefully consider the risks and uncertainties described below
before making an investment decision. These risks and uncertainties are not the
only ones facing VeriSign. Additional risks and uncertainties not presently
known to us or that we currently deem immaterial may also impair our business
operations.

     If any of the following risks actually occur, our business, financial
condition or operating results could be materially harmed. In such case, the
trading price of our common stock could decline and you may lose all or part of
your investment.

     This prospectus also contains forward-looking statements that involve risks
and uncertainties. Our actual results could differ materially from those
anticipated in these forward-looking statements as a result of certain factors
including the risks faced by us described below and elsewhere in this
prospectus.

We Have a Limited Operating History

     VeriSign was incorporated in April 1995, and we began introducing our
Internet-based trust services in June 1995.  Accordingly, we have only a limited
operating history on which to base an evaluation of our business and prospects.
Our prospects must be considered in light of the risks and uncertainties
encountered by companies in the early stages of development.  These risks and
uncertainties are often worse for companies in new and rapidly evolving markets.
Our success will depend on many factors, including, but not limited to, the
following:

   .  the rate and timing of the growth and use of IP networks for electronic
      commerce and communications;

   .  the extent to which digital certificates are used for such communications
      and commerce;

   .  the continued evolution of electronic commerce as a viable means of
      conducting business;

   .  the demand for our Internet-based trust services;

   .  competition levels;

   .  the perceived security of electronic commerce and communications over IP
      networks;

   .  the perceived security of our services, technology, infrastructure and
      practices; and

   .  our continued ability to maintain our current, and enter into additional,
      strategic relationships.

   To address these risks we must, among other things:

   .  successfully market our Internet-based trust services and our digital
      certificates to our new and existing customers;

   .  attract, integrate, train, retain and motivate qualified personnel;

   .  respond to competitive developments;

   .  successfully introduce new Internet-based trust services; and

                                       3
<PAGE>
 
   .  successfully introduce enhancements to our existing Internet-based trust
      services to address new technologies and standards.

   We cannot be certain that we will successfully address any of these risks.

We Have a History of Losses and Anticipate Future Losses

     We have experienced substantial net losses in each fiscal period since we
were formed. As of December 31, 1998, we had an accumulated deficit of $51.4
million. VeriSign's limited operating history, the emerging nature of its market
and the factors described under "--Our Business Depends on-the Adoption of IP
Networks" and "--Our Quarterly Operating Results May Fluctuate; Our Future
Revenues and Profitability Are Uncertain," among other factors, make prediction
of our future operating results difficult. In addition, we intend to increase
our expenditures in all areas in order to execute our business plan. As a
result, we expect to incur substantial additional losses. Although our revenues
have grown in recent periods, we may be unable to sustain such growth.
Therefore, you should not consider our historical growth indicative of future
revenue levels or operating results. We may never achieve profitability. Even if
we do, we may not be able to sustain it.

Our Business Depends on the Adoption of IP Networks

     In order for VeriSign to be successful, IP networks must be widely adopted,
in a timely manner, as a means of trusted and secure electronic commerce and
communications. Because electronic commerce and communications over IP networks
are new and evolving, it is difficult to predict the size of this market and its
sustainable growth rate. To date, many businesses and consumers have been
deterred from utilizing IP networks for a number of reasons, including, but not
limited to:

   .  potentially inadequate development of network infrastructure;

   .  security concerns including the potential for merchant or user
      impersonation and fraud or theft of stored data and information
      communicated over IP networks;

   .  inconsistent quality of service;

   .  lack of availability of cost-effective, high-speed service;

   .  limited numbers of local access points for corporate users;

   .  inability to integrate business applications on IP networks;

   .  the need to operate with multiple and frequently incompatible products;
      and

   .  a lack of tools to simplify access to and use of IP networks.

     The adoption of IP networks will require a broad acceptance of new methods
of conducting business and exchanging information. Companies and government
agencies that already have invested substantial resources in other methods of
conducting business may be reluctant to adopt new methods. Also, individuals
with established patterns of purchasing goods and services and effecting
payments may be reluctant to change.

     The use of IP networks may not increase or may increase more slowly than we
expect because the infrastructure required to support widespread use may not
develop. The Internet may continue to experience significant growth both in the
number of users and the level of use. However, the Internet infrastructure may
not be able to continue to support the demands placed on it by continued growth.

                                       4
<PAGE>
 
Continued growth may also affect the Internet's performance and reliability.  In
addition, the growth and reliability of IP networks could be harmed by delays in
development or adoption of new standards and protocols to handle increased
levels of activity or by increased governmental regulation.  Changes in, or
insufficient availability of, communications services to support IP networks
could result in poor performance and also adversely affect their usage.  Any of
these factors could materially harm our business.

Our Market is New and Evolving

     We target our Internet-based trust services at the market for trusted and
secure electronic commerce and communications over IP networks. This is a new
and rapidly evolving market that may not continue to grow. Accordingly, the
demand for our Internet-based trust services is very uncertain. Even if the
market for electronic commerce and communications over IP networks grows, our
Internet-based trust services may not be widely accepted. The factors that may
affect the level of market acceptance of digital certificates and, consequently,
our Internet-based trust services, include the following:

   .  market acceptance of products and services based upon authentication
      technologies other than those we use;

   .  public perception of the security of digital certificates and IP networks;

   .  the ability of the Internet infrastructure to accommodate increased levels
      of usage; and

   .  government regulations affecting electronic commerce and communications
      over IP networks.

     Even if digital certificates achieve market acceptance, our Internet-based
trust services may fail to address the market's requirements adequately.  If
digital certificates do not achieve market acceptance in a timely manner and
sustain such acceptance, or if our Internet-based trust services in particular
do not achieve or sustain market acceptance, our business would be materially
harmed.

Our Quarterly Operating Results May Fluctuate; Our Future Revenues and
Profitability Are Uncertain

     Our quarterly operating results have varied and may fluctuate significantly
in the future as a result of a variety of factors, many of which are outside our
control. These factors include the following:

   .  continued market acceptance of our Internet-based trust services;

   .  the long sales and implementation cycles for, and potentially large order
      sizes of, certain of our Internet-based trust services;

   .  the timing and execution of individual contracts;

   .  customer renewal rates for our Internet-based trust services;

   .  the timing of releases of new versions of Internet browsers or other
      third-party software products and networking equipment which include our
      digital certificate service interface technology;

   .  the mix of our services sold during a quarter;

                                       5
<PAGE>
 
   .  our success in marketing other Internet-based trust services to our
      existing customers and to new customers;

   .  continued development of our direct and indirect distribution channels,
      both in the U.S. and abroad;

   .  market acceptance of our Internet-based trust services or our competitors'
      products and services;

   .  our ability to attract, integrate, train, retain and motivate a
      substantial number of sales and marketing, research and development and
      technical support personnel;

   .  our ability to expand our operations;

   .  our success in assimilating the operations and personnel of SecureIT and
      any other acquired businesses;

   .  the amount and timing of expenditures related to expansion of our
      operations;

   .  the impact of price changes in our Internet-based trust services or our
      competitors' products and services; and

   .  general economic conditions and economic conditions specific to IP network
      industries.

     Our limited operating history and the emerging nature of our market make it
difficult to predict future revenues.  Our expenses are based, in part, on our
expectations regarding future revenues, and are largely fixed in nature,
particularly in the short term.  We may be unable to predict our future revenues
accurately or to adjust spending in a timely manner to compensate for any
unexpected revenue shortfall.  Accordingly, any significant shortfall of
revenues in relation to our expectations could cause significant declines in our
quarterly operating results.

     Due to all of the foregoing factors, our quarterly revenues and operating
results are difficult to forecast.  Therefore, we believe that period-to-period
comparisons of our operating results will not necessarily be meaningful, and you
should not rely upon them as an indication of our future performance.  Also, it
is likely that our operating results will fall below our expectations and the
expectations of securities analysts or investors in some future quarter.  In
such event, the market price of our common stock could be materially adversely
affected.

System Interruptions and Security Breaches Could Harm Our Business

     We depend on the uninterrupted operation of our secure data centers and our
other computer and communications systems. We must protect these systems from
loss, damage or interruption caused by fire, earthquake, power loss,
telecommunications failure or other events beyond our control. Most of our
systems are located at, and most of our customer information is stored in, our
facilities in Mountain View, California and Kawasaki, Japan, areas susceptible
to earthquakes. Any damage or failure that causes interruptions in our secure
data centers and our other computer and communications systems could materially
harm our business. In addition, our ability to issue digital certificates
depends on the efficient operation of the Internet connections from customers to
our secure data centers. Such connections depend upon efficient operation of web
browsers, Internet service providers and Internet backbone service providers,
all of which have had periodic operational problems or experienced outages in
the past. Any of these problems or outages could adversely affect customer
satisfaction.

                                       6
<PAGE>
 
     Our success also depends upon the scalability of our systems. Our systems
have not been tested at the volumes that may be required in the future. Thus, it
is possible that a substantial increase in demand for our Internet-based trust
services could cause interruptions in our systems. Any such interruptions could
adversely affect our ability to deliver our Internet-based trust services and
therefore could materially harm our business.

     Although we periodically perform, and retain accredited third parties to
perform, audits of our operational practices and procedures, we may not be able
to remain in compliance with our internal standards or those set by third-party
auditors. If we fail to maintain these standards, we may have to expend
significant time and money to return to compliance and our business could be
materially harmed.

     We retain certain confidential customer information in our secure data
centers. It is critical to our business strategy that our facilities and
infrastructure remain secure and are perceived by the marketplace to be secure.
Despite our security measures, our infrastructure may be vulnerable to physical
break-ins, computer viruses, attacks by hackers or similar disruptive problems.
It is possible that we may have to expend additional financial and other
resources to address such problems. Any physical or electronic break-ins or
other security breaches or compromises of the information stored at our secure
data centers may jeopardize the security of information stored on our premises
or in the computer systems and networks of our customers. In such an event, we
could face significant liability and customers could be reluctant to use our
Internet-based trust services. Such an occurrence could also result in adverse
publicity and therefore adversely affect the market's perception of the security
of electronic commerce and communications over IP networks as well as of the
security or reliability of our services.

We Face Significant Competition

     We anticipate that the market for services that enable trusted and secure
electronic commerce and communications over IP networks will remain intensely
competitive. We compete with larger and smaller companies that provide products
and services that are similar to certain aspects of our Internet-based trust
services. We expect that competition will increase in the near term, and that
our primary long-term competitors may not yet have entered the market. Increased
competition could result in pricing pressures, reduced margins or the failure of
our Internet-based trust services to achieve or maintain market acceptance, any
of which could materially harm our business. Several of our current and
potential competitors have longer operating histories and significantly greater
financial, technical, marketing and other resources. As a result, we may not be
able to compete effectively. For a more detailed description of the competitive
threats facing us.

Technological Changes Will Affect Our Business

     The emerging nature of the Internet and digital certificate markets and
their rapid evolution requires us to continually improve the performance,
features and reliability of our Internet-based trust services, particularly in
response to competitive offerings. We must also introduce any new Internet-based
trust services as quickly as possible. The success of new Internet-based trust
services depends on several factors, including proper new service definition and
timely completion, introduction and market acceptance of our new Internet-based
trust services. We may not succeed in developing and marketing new Internet-
based trust services that respond to competitive and technological developments
and changing customer needs. This could materially harm our business.

     If new Internet, networking or telecommunication technologies or standards
are widely adopted or if other technological changes occur, we may need to
expend significant resources to adapt our Internet-based trust services.

                                       7
<PAGE>
 
We Must Manage Our Growth and Expansion

     Our historical growth has placed, and any further growth is likely to
continue to place, a significant strain on our resources. VeriSign has grown
from 26 employees at December 31, 1995 to 315 employees at December 31, 1998. We
have also opened additional sales offices and have significantly expanded our
operations, both in the U.S. and abroad, during this time period. We expanded
our operations by acquiring SecureIT during 1998. To be successful, we will need
to implement additional management information systems, develop further our
operating, administrative, financial and accounting systems and controls and
maintain close coordination among our executive, engineering, accounting,
finance, marketing, sales and operations organizations. Any failure to manage
growth effectively could materially harm our business.

We Depend on Key Personnel

     We depend on the performance of our senior management team and other key
employees. Our success will depend on our ability to retain and motivate these
individuals. Our success will also depend on our ability to attract, integrate,
train, retain and motivate additional highly skilled technical and sales and
marketing personnel, both in the U.S. and abroad. There is intense competition
for these personnel. In addition, our stringent hiring practices for some of our
key personnel, which consist of background checks into prospective employees'
criminal and financial histories, further limit the number of qualified persons
for such positions. See "Business--Security and Trust Practices." VeriSign has
no employment agreements with any of its key executives that prevent them from
leaving VeriSign at any time. In addition, we do not maintain key person life
insurance for any of our officers or key employees other than our President and
Chief Executive Officer. The loss of the services of any of our senior
management team or other key employees or our failure to attract, integrate,
train, retain and motivate additional key employees could materially harm our
business.

We Must Establish and Maintain Strategic Relationships

     One of our significant business strategies has been to enter into strategic
or other similar collaborative relationships in order to reach a larger customer
base than we could reach through our direct sales and marketing efforts. We may
need to enter into additional relationships to execute our business plan. We may
not be able to enter into additional, or maintain our existing, strategic
relationships on commercially reasonable terms. If we failed, we would have to
devote substantially more resources to the distribution, sale and marketing of
our Internet-based trust services than we would otherwise. Furthermore, as a
result of our emphasis on these relationships, our success in such relationships
will depend both on the ultimate success of the other parties to such
relationships, particularly in the use and promotion of IP networks for trusted
and secure electronic commerce and communications, and on the ability of certain
of these parties to market our Internet-based trust services successfully.
Failure of one or more of our strategic relationships to result in the
development and maintenance of a market for our Internet-based trust services
could materially harm our business.

     Our existing strategic relationships do not, and any future strategic
relationships may not, afford VeriSign any exclusive marketing or distribution
rights. In addition, the other parties may not view their relationships with us
as significant for their own businesses. Therefore, they could reduce their
commitment to VeriSign at any time in the future. These parties could also
pursue alternative technologies or develop alternative products and services
either on their own or in collaboration with others, including our competitors.
If we are unable to maintain our strategic relationships or to enter into
additional strategic relationships, our business could be materially harmed.

Certain of Our Internet-based Trust Services Have Lengthy Sales and
Implementation Cycles

                                       8
<PAGE>
 
     We market many of our Internet-based trust services directly to large
companies and government agencies. The sale and implementation of our services
to these entities typically involves a lengthy education process and a
significant technical evaluation and commitment of capital and other resources.
This process is also subject to the risk of delays associated with customers'
internal budgeting and other procedures for approving large capital
expenditures, deploying new technologies within their networks and testing and
accepting new technologies that affect key operations. As a result, the sales
and implementation cycles associated with certain of our Internet-based trust
services can be lengthy, potentially lasting from three to six months. Our
quarterly and annual operating results could be materially harmed if orders
forecasted for a specific customer for a particular quarter are not realized.

Our Internet-based Trust Services Could Have Unknown Defects

     Services as complex as those we offer or develop frequently contain
undetected defects or errors. Despite testing, defects or errors may occur in
existing or new Internet-based trust services, which could result in loss of or
delay in revenues, loss of market share, failure to achieve market acceptance,
diversion of development resources, injury to our reputation, increased
insurance costs or increased service and warranty costs, any of which could
materially harm our business. Furthermore, we often provide implementation,
customization, consulting and other technical services in connection with the
implementation and ongoing maintenance of our Internet-based trust services and
our digital certificate service agreements. The performance of these Internet-
based trust services typically involves working with sophisticated software,
computing and communications systems. Our failure or inability to meet customer
expectations or project milestones in a timely manner could also result in loss
of or delay in revenues, loss of market share, failure to achieve market
acceptance, injury to our reputation and increased costs.

     Because customers rely on our Internet-based trust services for critical
security applications, any significant defects or errors in our Internet-based
trust services might discourage customers from subscribing to our services. Such
defects or errors could also result in tort or warranty claims. Although we
attempt to reduce the risk of losses resulting from such claims through warranty
disclaimers and liability limitation clauses in our sales agreements, these
contractual provisions may not be enforceable in every instance. Furthermore,
although we maintain errors and omissions insurance, such insurance coverage may
not adequately cover us for claims. If a court refused to enforce the liability-
limiting provisions of our contracts for any reason, or if liabilities arose
that were not contractually limited or adequately covered by insurance, our
business could be materially harmed.

Public Key Cryptography Technology Is Subject to Certain Risks

     Our Internet-based trust services depend on public key cryptography
technology. With public key cryptography technology, a user is given a public
key and a private key, both of which are required to encrypt and decode
messages. The security afforded by this technology depends on the integrity of a
user's private key and that it is not stolen or otherwise compromised. The
integrity of private keys also depends in part on the application of certain
mathematical principles known as "factoring." This integrity is predicated on
the assumption that the factoring of large numbers into their prime number
components is difficult. Should an easy factoring method be developed, then the
security of encryption products utilizing public key cryptography technology
would be reduced or eliminated. Furthermore, any significant advance in
techniques for attacking cryptographic systems could also render some or all of
our existing Internet-based trust services obsolete or unmarketable. Even if no
breakthroughs in factoring or other methods of attacking cryptographic systems
are made, factoring problems can theoretically be solved by computer systems
significantly faster and more powerful than those presently available. Current
or future governmental regulation regarding the use, scope and strength of
public key cryptography could also limit our ability to develop and distribute
digital certificates with encryption strong enough to maintain the integrity
of a user's private key against factoring by more powerful

                                       9
<PAGE>
 
computer systems. If such improved techniques for attacking cryptographic
systems are ever developed, we would likely have to reissue digital
certificates to some or all of our customers, which could damage our
reputation and brand or otherwise harm our business. In the past there have
been public announcements of the successful decoding of certain cryptographic
messages and of the potential misappropriation of private keys. Such publicity
could also adversely affect the public perception as to the safety of the
public key cryptography technology included in our digital certificates. Such
adverse public perception could harm our business.

Our International Operations Are Subject to Certain Risks

     Revenues of VeriSign Japan K.K., or VeriSign Japan, and revenues from other
international affiliates and customers accounted for approximately 9% of our
revenues in 1997 and approximately 14% of our revenues in 1998. We intend to
expand our international operations and international sales and marketing
activities. Expansion into these markets has required and will continue to
require significant management attention and resources. We may also need to
tailor our Internet-based trust services for a particular market and to enter
into international distribution and operating relationships. We have limited
experience in localizing our Internet-based trust services and in developing
international distribution or operating relationships. We may not succeed in
expanding our Internet-based trust service offerings into international markets.
Any such failure could harm our business.

     In addition, there are certain risks inherent in doing business on an
international basis, including, among others:

   .  regulatory requirements;

   .  legal uncertainty regarding liability;

   .  export and import restrictions on cryptographic technology and products
      incorporating that technology;

   .  tariffs and other trade barriers;

   .  difficulties in staffing and managing foreign operations;

   .  longer sales and payment cycles;

   .  problems in collecting accounts receivable;

   .  difficulty of authenticating customer information;

   .  political instability;

   .  seasonal reductions in business activity; and

   .  potentially adverse tax consequences.

     We have licensed to certain international affiliates the VeriSign
Processing Center platform, which is designed to replicate our own secure data
centers and allows the affiliate to offer back-end processing of Internet-based
trust services. The VeriSign Processing Center platform provides an affiliate
with the knowledge and technology to offer Internet-based trust services similar
to those offered by VeriSign. It is critical to our business strategy that the
facilities and infrastructure used in issuing and marketing digital certificates
remain secure and be perceived by the marketplace to be secure. Although we
provide the affiliate with training in security and trust practices, network
management and customer

                                       10
<PAGE>
 
service and support, these practices are performed by the affiliate and are
outside of our control. Any failure of an affiliate to maintain the privacy of
confidential customer information could result in negative publicity and
therefore adversely affect the market's perception of the security of our
services as well as the security of electronic commerce and communication over
IP networks generally.

     All of our international revenues from sources other than VeriSign Japan
are denominated in U.S. dollars. If additional portions of our international
revenues were to be denominated in foreign currencies, we could become subject
to increased risks relating to foreign currency exchange rate fluctuations.

We Depend on Authentication Information

     We rely upon information provided by third-party sources to authenticate
the identity of customers requesting certain of our digital certificates. This
information is presently only available from a limited number of sources and we
currently procure such information from single sources. Reliance on single
sources involves certain risks and uncertainties, including the possibility of
delayed or discontinued availability. Any such delay or unavailability, coupled
with any inability to develop alternative sources quickly and cost-effectively,
could impair our ability to deliver certain digital certificates on a timely
basis and result in the cancellation of orders, increased costs and injury to
our reputation. This could harm our business. Reliance on third-party
information sources for authentication has also limited the distribution of
certain of our digital certificates outside of the U.S., where access to such
sources has been unavailable or limited.

     Additionally, accurate authentication of the identity of the individuals
and entities to which we issue digital certificates is necessary for such
digital certificates to provide security and trust. Therefore, if any
authentication information that we rely upon is inaccurate, it could adversely
affect our reputation and result in tort or warranty claims from customers
relying upon our digital certificates for trusted and secure electronic commerce
and communications. This could materially harm our business.

We Could Be Affected By Government Regulation

     Exports of software products utilizing encryption technology are generally
restricted by the U.S. and various non-U.S. governments. Although we have
obtained approval to export our Global Server digital certificate service and
none of our other Internet-based trust services are currently subject to export
controls under U.S. law, the list of products and countries for which export
approval is required could be revised in the future to include more digital
certificate products and related services. If we do not obtain required
approvals we may not be able to sell certain Internet-based trust services in
international markets. There are currently no federal laws or regulations that
specifically control certificate authorities, but a limited number of states
have enacted legislation or regulations with respect to certificate authorities.
If the market for digital certificates grows, the U.S. federal or state or non-
U.S. governments may choose to enact further regulations governing certificate
authorities or other providers of digital certificate products and related
services. Such regulations or the costs of complying with such regulations could
harm our business.

     Many companies conducting electronic commerce over IP networks do not
collect sales or other similar taxes with respect to shipments of goods into
other states or foreign countries or with respect to other transactions
conducted between parties in different states or countries. It is possible that
the U.S. federal or state or non-U.S. governments may seek to impose sales taxes
on companies that engage in electronic commerce over IP networks. In the event
that government bodies succeed in imposing sales or other taxes on electronic
commerce, the growth of the use of IP networks for electronic commerce could
slow substantially, which could materially harm our business.

                                       11
<PAGE>
 
     Due to the increasing popularity of IP networks, it is possible that laws
and regulations may be enacted covering issues such as user privacy, pricing,
content and quality of products and services. The increased attention focused
upon these issues as a result of the adoption of other laws or regulations may
reduce the rate of growth of IP networks, which in turn could result in
decreased demand for our Internet-based trust services or could otherwise
materially harm our business.

Acquisitions Could Harm Our Business

     During 1998, we acquired SecureIT. If we are unable to successfully
complete the integration of SecureIT, our business could be materially harmed.
We may acquire additional businesses, technologies, product lines or service
offerings in the future. Acquisitions involve a number of risks including, among
others:

   .  the difficulty of assimilating the operations and personnel of the
      acquired businesses;

   .  the potential disruption of our business;

   .  our inability to integrate, train, retain and motivate key personnel of
      the acquired business;

   .  the diversion of our management from our day-to-day operations;

   .  our inability to incorporate acquired technologies successfully into our
      Internet-based trust services;

   .  the additional expense associated with completing an acquisition and
      amortizing any acquired intangible assets;

   .  the potential impairment of relationships with our employees, customers
      and strategic partners; and

   .  the inability to maintain uniform standards, controls, procedures and
      policies.

     If we are unable to successfully address any of these risks, our business
could be materially harmed.

We Face Risks Related to Intellectual Property Rights

     Our success depends on our internally developed technologies and other
intellectual property. Despite our precautions, it may be possible for a third
party to copy or otherwise obtain and use our intellectual property or trade
secrets without authorization. In addition, it is possible that others may
independently develop substantially equivalent intellectual property. If we do
not effectively protect our intellectual property, our business could be
materially harmed.

     In the future we may have to resort to litigation to enforce our
intellectual property rights, to protect our trade secrets or to determine the
validity and scope of the proprietary rights of others. Such litigation,
regardless of its outcome, could result in substantial costs and diversion of
management and technical resources.

     We also license third-party technology, such as public key cryptography
technology licensed from RSA and other technology that is used in our products,
to perform key functions. These third-party technology licenses may not continue
to be available to us on commercially reasonable terms or at all. Our business
could be materially harmed if we lost the rights to use these technologies. A
third party could claim that the licensed software infringes any patent or other
proprietary right. Litigation between the licensor and a third party or between
us and a third party could lead to royalty obligations for which 

                                       12
<PAGE>
 
we are not indemnified or for which such indemnification is insufficient, or we
may not be able to obtain any additional license on commercially reasonable
terms or at all.

     The loss of, or our inability to obtain or maintain, any of these
technology licenses could delay the introduction of our Internet-based trust
services until equivalent technology, if available, is identified, licensed and
integrated. This could harm our business.

     From time to time, we have received, and may receive in the future, notice
of claims of infringement of other parties' proprietary rights. Infringement or
other claims could be made against us in the future. Any such claims, with or
without merit, could be time-consuming, result in costly litigation and
diversion of technical and management personnel, cause product shipment delays
or require us to develop non-infringing technology or enter into royalty or
licensing agreements. Such royalty or licensing agreements, if required, may not
be available on acceptable terms or at all. If a successful claim of product
infringement were made against us and we could not develop non-infringing
technology or license the infringed or similar technology on a timely and cost
effective basis, our business could be harmed.

Year 2000 Issues Could Affect Our Business

     We are in the process of assessing and remediating any Year 2000 issues
with the computer communications, software and security systems that we use to
deliver and manage our Internet-based trust services and to manage our internal
operations. Despite our testing and remediating, our systems may contain errors
or faults with respect to the Year 2000. For a more detailed discussion of Year
2000 issues, please see "Item 7: Management's Discussion and Analysis of
Financial Condition and Results of Operations--Year 2000 Issues" in our Annual
Report on Form 10-K, filed with the Securities and Exchange Commission on
February 22, 1999. If our systems do not operate properly with regard to the
Year 2000 and thereafter we could incur unanticipated expenses to remedy any
problems, which could adversely affect our business.

     Customer's purchasing plans could be affected by Year 2000 issues as they
may need to expend significant resources to correct their existing systems. This
situation may result in reduced funds available to implement the infrastructure
needed to conduct trusted and secure electronic commerce and communications over
IP networks or to purchase our Internet-based trust services. These factors
could materially harm our business.

We Have Implemented Certain Anti-Takeover Provisions

     Certain provisions of our Amended and Restated Certificate of Incorporation
and Bylaws, as well as provisions of Delaware law could make it more difficult
for a third party to acquire us, even if doing so would be beneficial to our
stockholders.

Future Sales of Shares Could Affect Our Stock Price

     If our stockholders sell substantial amounts of our common stock in the
public market following this offering, the market price of our common stock
could fall. We have outstanding approximately 24,850,356 shares of common stock
(assuming no exercise of outstanding options after January 29, 1999). Of these
shares 18,801,527 are currently eligible for sale in the public market. After
certain lockup agreements with the underwriters of a prior public offering to
expire on April 26, 1999, an additional 4,745,944 shares will be eligible for
sale in the public market. The remaining 1,302,885 shares will be eligible for
public sale after July 6, 1999, subject to the volume limitations and other
conditions of Rule 144.

                                       13
<PAGE>
 
     In addition, the former shareholders of SecureIT have certain rights to
require VeriSign to file a registration statement to register the resale of
373,093 shares.

     These share numbers exclude 4,129,094 shares subject to outstanding stock
options and 797,496 shares reserved for future issuance under our stock plans as
of December 31, 1998.

Our Stock Price May Be Volatile

     The market price of our common stock has fluctuated in the past and is
likely to fluctuate in the future.  In addition, the market prices of securities
of other technology companies, particularly Internet-related companies, have
been highly volatile.  Factors that may have a significant effect on the market
price of our common stock include:'

   .  fluctuations in our operating results;

   .  announcements of technological innovations or new Internet-based trust
      services by us or new products or services by our competitors;

   .  analysts' reports and projections;

   .  regulatory actions; and

   .  general market, economic or political conditions in the U.S. or abroad.

     Investors may not be able to resell their shares of our common stock at or
above the offering price.  See "Price Range of Common Stock."

                                USE OF PROCEEDS

     VeriSign will not receive any of the proceeds from the sale of shares by
the selling stockholder.

                                       14
<PAGE>
 
                              Selling Stockholder

     The following table sets forth certain information known to VeriSign with
respect to the beneficial ownership of the Company's common stock as of February
28, 1999 by the selling stockholder. The selling stockholder has not had any
position, office or other material relationship with VeriSign within the past
three years. The table assumes that the selling stockholder sells all of the
shares offered by him in this offering. However, VeriSign is unable to determine
the exact number of shares that will actually be sold or when or if such sales
will occur. VeriSign will not receive the proceeds of any shares sold under this
prospectus.

     The selling stockholder has advised VeriSign that it is the beneficial
owner of the shares being offered.
<TABLE>
<CAPTION>
                                                Shares Beneficially                           Shares Beneficially
                                               Owned Before Offering                         Owned After Offering
                                               ---------------------       Shares Being      --------------------
Name                                           Number        Percent         Offered         Number        Percent
- ----                                           ------        -------         -------         ------        -------   
<S>                                            <C>           <C>             <C>             <C>           <C>
Mahendra B. Vora                               90,000       less than         45,000         45,000       less than 
                                                                1%                                            1%
</TABLE>                                                        

                                       15
<PAGE>
 
                             PLAN OF DISTRIBUTION

     The selling stockholder is an assignee of shares of common stock from a
former stockholder of SecureIT, Inc., a company which VeriSign acquired in July
1998.  The selling stockholder is bound by a registration rights agreement with
VeriSign.  To VeriSign's knowledge, the selling stockholder has not entered into
any agreement, arrangement or understanding with any particular broker or market
maker with respect to the shares offered hereby, nor does VeriSign know the
identity of the brokers or market makers that will participate in the offering.

     The shares of common stock may be offered and sold from time to time by the
selling stockholder or by pledgees, donees, transferees and other successors in
interest. The selling stockholder will act independently of VeriSign in making
decisions with respect to the timing, manner and size of each sale. Such sales
may be made over the Nasdaq National Market or otherwise, at then prevailing
market prices, at prices related to prevailing market prices or at negotiated
prices. The shares may be sold by one or more of the following:

   .  a block trade in which the broker-dealer engaged by the selling
      stockholder will attempt to sell the shares as agent but may position and
      resell a portion of the block as principal to facilitate the transaction;

   .  purchases by the broker-dealer as principal and resale by such broker or
      dealer for its account pursuant to this Prospectus; and

   .  ordinary brokerage transactions and transactions in which the broker
      solicits purchasers.

     VeriSign has been advised by the selling stockholder that it has not, as of
the date hereof, entered into any arrangement with a broker-dealer for the sale
of shares through a block trade, special offering, or secondary distribution of
a purchase by a broker-dealer.  In effecting sales, broker-dealers engaged by
the selling stockholder may arrange for other broker-dealers to participate.
Broker-dealers will receive commissions or discounts from the selling
stockholder in amounts to be negotiated immediately prior to the sale.

     In connection with distributions of the shares or otherwise, the selling
stockholder may enter into hedging transactions with broker-dealers.  In
connection with these transactions, broker-dealers may engage in short sales of
the shares in the course of hedging the positions they assume with selling
stockholder.  The selling stockholder may also sell shares short and redeliver
the shares to close out such short positions.  The selling stockholder may also
enter into option or other transactions with broker-dealers which require the
delivery to the broker-dealer of the shares, which the broker-dealer may resell
or otherwise transfer under this prospectus.  A selling stockholder may also
loan or pledge the shares to a broker-dealer and the broker-dealer may sell the
shares so loaned or, upon a default, the broker-dealer may effect sales of the
pledged shares under this Prospectus.

     Broker-dealers or agents may receive compensation in the form of
commissions, discounts or concessions from the selling stockholder in amounts to
be negotiated in connection with the sale.  Broker-dealers and any other
participating broker-dealers may be deemed to be "underwriters" within the
meaning of the Securities Act in connection with the sales, and any commission,
discount or concession may be deemed to be underwriting discounts or commissions
under the Securities Act.  The selling stockholder has agreed with VeriSign in
the registration rights agreement not to sell any of the shares under this
Prospectus in an underwritten offering without VeriSign's prior written consent.
In addition, any securities covered by this Prospectus which qualify for sale
under Rule 144 of the Securities Act may be sold under Rule 144 rather than
under this Prospectus.

                                       16
<PAGE>
 
     VeriSign has advised the selling stockholder that the anti-manipulation
rules under the Exchange Act may apply to sales of shares in the market and to
the activities of the selling stockholder and its affiliates.  The selling
stockholder has advised VeriSign that during such time as he may be engaged in
the attempt to sell shares registered, he will:

   .  not engage in any stabilization activity in connection with any of
      VeriSign's securities;

   .  not bid for or purchase any of VeriSign's securities or any rights to
      acquire VeriSign's securities, or attempt to induce any person to purchase
      any of VeriSign's securities or rights to acquire VeriSign's securities
      other than as permitted under the Exchange Act;

   .  not effect any sale or distribution of the shares until after the
      prospectus shall have been appropriately amended or supplemented, if
      required, to set forth the terms thereof; and

   .  effect all sales of shares in broker's transactions through broker-dealers
      acting as agents, in transactions directly with market makers or in
      privately negotiated transactions where no broker or other third party
      (other than the purchaser) is involved.

     Under certain circumstances, VeriSign has the ability to suspend the use of
this prospectus if, in the good faith judgment of the Board of Directors of
VeriSign, it would be seriously detrimental to VeriSign and its stockholders for
resales of shares to be made due to:

   .  the existence of a material development or potential material development
      with respect to or involving VeriSign which VeriSign would be obligated to
      disclose in the prospectus, which disclosure would in the good faith
      judgment of the Board of Directors of VeriSign be premature or otherwise
      inadvisable at such time and would have a material adverse affect upon
      VeriSign and its stockholders, or

   .  the occurrence of any event that makes any statement made in the
      prospectus or any document incorporated or deemed to be incorporated
      therein by reference untrue in any material respect or which requires the
      making of any changes in the prospectus so that it will not contain any
      untrue statement of a material fact required to be stated therein or
      necessary to make the statements therein not misleading or omit to state
      any material fact required to be stated therein or necessary to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading.

     This offering will terminate on the earlier of:

   .  the termination of the period during which the Company is required to
      maintain the effectiveness of the Registration Statement of which this
      Prospectus forms a part, or

   .  the date on which all shares offered have been sold by the selling
      stockholder.

     VeriSign has agreed to pay the expenses of registering the shares under the
Securities Act, including registration and filing fees, printing expenses,
administrative expenses and certain legal and accounting fees.  The selling
stockholder will bear all discounts, commissions or other amounts payable to
underwriters, dealers or agents as well as fees and disbursements for legal
counsel retained by any selling stockholder.

     VeriSign and the selling stockholder have agreed to indemnify each other
and certain other related parties for certain liabilities in connection with the
registration of the Shares offered hereby.

                                       17
<PAGE>
 
     Upon the occurrence of any of the following events, this prospectus will be
amended to include additional disclosure before offers and sales of the
securities in question are made:

   .  to the extent the securities are sold at a fixed price or at a price other
      than the prevailing market price, such price would be set forth in the
      prospectus,

   .  if the securities are sold in block transactions and the purchaser acting
      in the capacity of an underwriter wishes to resell, such arrangements
      would be described in the prospectus,

   .  if the selling stockholder sells to a broker-dealer acting in the capacity
      as an underwriter, such broker-dealer will be identified in the prospectus
      and

   .  if the compensation paid to broker-dealers is other than usual and
      customary discounts, concessions or commissions, disclosure of the terms
      of the transaction would be included in the prospectus.

                                 LEGAL MATTERS

     The validity of the shares of common stock offered hereby will be passed
upon for VeriSign by Fenwick & West LLP, Palo Alto, California.

                                    EXPERTS

     The consolidated balance sheets of VeriSign, Inc., and subsidiaries as of
December 31, 1998 and 1997 and the consolidated statements of operations,
stockholders' equity, and cash flows for each of the years in the three-year
period ended December 31, 1998, have been incorporated by reference herein and
in the registration statement in reliance upon the report of KPMG LLP,
independent auditors, incorporated by reference herein, and upon the authority
of said firm as experts in accounting and auditing.

                                       18
<PAGE>
 
                  DOCUMENTS INCORPORATED BY REFERENCE IN THIS
                                  PROSPECTUS

     This Prospectus incorporates documents by reference which are not presented
herein or delivered herewith.

     All documents filed by us pursuant to Section 13(a), 13(c), 14 or 15(d) of
the Securities Exchange Act, after the date of this prospectus are incorporated
by reference into and to be a part of this prospectus from the date of filing of
those documents.

     You should rely only on the information contained in this document or that
we have referred you to.  We have not authorized anyone to provide you with
information that is different.

     The following documents which were filed by VeriSign with the Securities
and Exchange Commission, are incorporated by reference into this prospectus.

     .  VeriSign's Annual Report on Form 10-K for the year ended December 31,
        1998 (SEC file number 000-28064 and filing date February 22, 1999)

     .  VeriSign's Registration Statement on Form 8-A (SEC file number 000-23593
        and filing date January 5, 1998, which describes VeriSign's common
        stock)

     Any statement contained in a document incorporated or deemed to be
incorporated herein by reference will be deemed to be modified or superseded for
purposes of this prospectus to the extent that a statement contained in this
prospectus or any other subsequently filed document that is deemed to be
incorporated in this prospectus by reference modifies or supersedes the
statement.  Any statement so modified or superseded will not be deemed, except
as so modified or superseded, to constitute a part of this prospectus.

                      WHERE YOU CAN FIND MORE INFORMATION

     The documents incorporated by reference into this prospectus are available
from us upon request.  We will provide a copy of any and all of the information
that is incorporated by reference in this prospectus, not including exhibits to
the information unless those exhibits are specifically incorporated by reference
into this proxy statement prospectus, to any person, without charge, upon
written or oral request.

     Requests for documents should be directed to VeriSign, Inc., Attention:
Investor Relations, 1350 Charleston Road, Mountain View, California, 94043-1331,
telephone number (650) 961-7500.

     We file reports, proxy statements and other information with the Securities
and Exchange Commission.  Copies of our reports, proxy statements and other
information may be inspected and copied at the public reference facilities
maintained by the SEC:

Judiciary Plaza           Citicorp Center             Seven World Trade Center
Room 1024                 5000 West Madison Street    13th Floor
450 Fifth Street, N.W.    Suite 1400                  New York, New York  10048
Washington, D.C. 20549    Chicago, Illinois  60661

     Copies of these materials can also be obtained by mail at prescribed rates
from the Public Reference Section of the SEC, 450 Fifth Street, N.W.,
Washington, D.C. 20549 or by calling the SEC at 

                                       19
<PAGE>
 
1-800-SEC-0330. The SEC maintains a Website that contains reports, proxy
statements and other information regarding each of us. The address of the SEC
Website is http://www.sec.gov.

     VeriSign has filed a registration statement under the Securities Act with
the Securities and Exchange Commission with respect to the shares to be sold by
the selling stockholder. This prospectus has been filed as part of the
registration statement. This prospectus does not contain all of the information
set forth in the registration statement because certain parts of the
registration statement are omitted in accordance with the rules and regulations
of the SEC. The registration statement is available for inspection and copying
as set forth above.

     This prospectus does not constitute an offer to sell, or a solicitation of
an offer to purchase, the securities offered by this prospectus or the
solicitation of a proxy, in any jurisdiction to or from any person to whom or
from whom it is unlawful to make such offer, solicitation of an offer or proxy
solicitation in such jurisdiction. Neither the delivery of this prospectus nor
any distribution of securities pursuant to this prospectus shall, under any
circumstances, create any implication that there has been no change in the
information set forth or incorporated herein by reference or in our affairs
since the date of this prospectus.

                                       20
<PAGE>
 
================================================================================














                                VERISIGN, INC.




                               45,000 Shares of
                                 Common Stock








                             ____________________

                                  PROSPECTUS
                             ____________________
                                        






================================================================================
<PAGE>
 
                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  Other Expenses of Issuance and Distribution.

     The aggregate estimated expenses to be paid by the Registrant in connection
with this offering are as follows:

Securities and Exchange Commission registration fee..................$     1,565
Accounting fees and expenses.........................................      8,000
Legal fees and expenses..............................................     10,000
Miscellaneous........................................................        435
                                                                      ----------
  Total..............................................................$    20,000
                                                                      ==========

ITEM 15.  Indemnification of Directors and Officers.

     Section 145 of the Delaware General Corporation Law authorizes a court to
award, or a corporation's Board of Directors to grant, indemnity to directors
and officers in terms sufficiently broad to permit such indemnification under
certain circumstances for liabilities (including reimbursement for expenses
incurred) arising under the Securities Act of 1933, as amended (the "Securities
Act").

     As permitted by the Delaware General Corporation Law, the Registrant's
Third Amended and Restated Certificate of Incorporation includes a provision
that eliminates the personal liability of its directors for monetary damages for
breach of fiduciary duty as a director, except for liability (i) for any breach
of the director's duty of loyalty to the Registrant or its stockholders, (ii)
for acts or omissions not in good faith or that involve intentional misconduct
or a knowing violation of law, (iii) under section 174 of the Delaware General
Corporation Law (regarding unlawful dividends and stock purchases) or (iv) for
any transaction from which the director derived an improper personal benefit.

     As permitted by the Delaware General Corporation Law, the Registrant's
Amended and Restated Bylaws, which will become effective upon the completion of
this offering, provide that (i) the Registrant is required to indemnify its
directors and officers to the fullest extent permitted by the Delaware General
Corporation Law, subject to certain very limited exceptions, (ii) the Registrant
may indemnify its other employees and agents to the extent that it indemnifies
its officers and directors, unless otherwise required by law, its Certificate of
Incorporation, its Amended and Restated Bylaws, or agreement, (iii) the
Registrant is required to advance expenses, as incurred, to its directors and
executive officers in connection with a legal proceeding to the fullest extent
permitted by the Delaware General Corporation Law, subject to certain very
limited exceptions and (iv) the rights conferred in the Amended and Restated
Bylaws are not exclusive.

     The Registrant has entered into Indemnification Agreements with each of its
current directors and certain of its executive officers and intends to enter
into such Indemnification Agreements with each of its other executive officers
to give such directors and executive officers additional contractual assurances
regarding the scope of the indemnification set forth in the Registrant's
Certificate of Incorporation and to provide additional procedural protections.
At present, there is no pending litigation or proceeding involving a director,
officer or employee of the Registrant regarding which indemnification is sought,
nor is the Registrant aware of any threatened litigation that may result in
claims for indemnification.

     The indemnification provisions in the Registrant's Certificate of
Incorporation, Amended and Restated Bylaws and the Indemnification Agreements
entered into between the Registrant and each of its directors and executive
officers may be sufficiently broad to permit indemnification of the Registrant's
directors and executive officers for liabilities arising under the Securities
Act.

                                      II-1
<PAGE>
 
     The Registrant has obtained directors' and officers' liability insurance
with a per claim and annual aggregate coverage limit of $5 million.

ITEM 16.  Undertakings.
                                                            
     The undersigned Registrant hereby undertakes:

          (1)  To file, during any period in which offers or sales are being
made pursuant to this Registration Statement, a post-effective amendment to this
Registration Statement:

               (i)   to include any prospectus required by Section 10(a)(3) of
          the Securities Act of 1933 (the "Securities Act");

               (ii)  to reflect in the prospectus any facts or events arising
          after the effective date of the registration statement (or the most
          recent post-effective amendment thereof) which, individually or in the
          aggregate, represent a fundamental change in the information set forth
          in the Registration Statement (notwithstanding the foregoing, any
          increase or decrease in volume or securities offered (if the total
          dollar value of securities offered would not exceed that which was
          registered) and any deviation from the low or high end of the
          estimated maximum offering range may be reflected in the form of
          prospectus filed with the Commission pursuant to Rule 424(b) if, in
          the aggregate, the changes in volume and price represent no more than
          a 20% change in the maximum aggregate offering price set forth in the
          "Calculation of Registration Fee" table in the effective registration
          statement); and

               (iii) to include any material information with respect to the
          plan of distribution not previously disclosed in the Registration
          Statement or any material change to such information in the
          Registration Statement; provided, however, that paragraphs (1)(i) and
                                  --------  -------                            
          (1)(ii) do not apply if the information required to be included in a
          post-effective amendment by paragraphs (1)(i) or (1)(ii) is contained
          in any periodic report filed with or furnished to the Securities and
          Exchange Commission by the Registrant pursuant to Section 13 or
          Section 15(d) of the Securities Exchange Act of 1934 (the "Exchange
          Act") that are incorporated by reference in the Registration
          Statement.

          (2)  That, for the purpose of determining any liability under the
Securities Act, each post-effective amendment shall be deemed a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.

          (3)  To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

          (4)  That, for purposes of determining any liability under the
Securities Act, each filing of the Registrant's annual report pursuant to
Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each
filing of an employee benefit plan's annual report pursuant to Section 15(d) of
the Exchange Act) that is incorporated by reference in this Registration
Statement shall be deemed to be a new registration statement relating to the
securities offered herein, and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described under Item 15 above, or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

                                      II-2
<PAGE>
 
ITEM 17.  Exhibits.

     (a) The following exhibits are filed herewith:

 Exhibit
 Number             Exhibit Title
 ------             -------------
   2.01   Agreement and Plan of Reorganization dated as of July 6, 1998 by and
          between Registrant, VeriSign Merger Corp., SecureIT and the
          shareholders of SecureIT.(1)

   3.01   Third Amended and Restated Certificate of Incorporation of the
          Registrant.(2)

   3.02   Amended and Restated Bylaws of Registrant.(2)

   4.01   Registration Rights Agreement dated as of July 6, 1998 by and between
          Registrant and the former shareholders of SecureIT.(3)

   4.02   Form of Specimen Common Stock Certificate.(2)

   5.01   Opinion of Fenwick & West LLP regarding legality of the securities
          being registered.

  23.01   Consent of Fenwick & West LLP (included in Exhibit 5.01).

  23.02   Consent of KPMG LLP, Independent Auditors.

  24.01   Power of Attorney (see Page II-4).

- ------------------ 

(1)  Previously filed as an exhibit to the Registrant's Current Report on Form 
     8-K filed on July 21, 1998 and incorporated herein by reference.

(2)  Previously filed with the Commission as an exhibit to the Registrant's
     Registration Statement on Form S-1 (File Number 333-49789) and incorporated
     herein by reference.

(3)  Previously filed with the Commission as an exhibit to the Registrant's
     Registration Statement on Form S-8 (File No. 333-58583).

          (b) Financial statement schedules are omitted because the information
called for is not required or is shown either in the financial statements or the
notes thereto.

ITEM 17.  Undertakings.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described under Item 14 above, or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable.  In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

     The undersigned Registrant hereby undertakes that:

     (1)  For purposes of determining any liability under the Securities Act,
the information omitted from the form of prospectus filed as part of this
Registration Statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this Registration
Statement as of the time it was declared effective.

     (2)  For the purpose of determining any liability under the Securities Act,
each post-effective amendment that contains a form of prospectus shall be deemed
to be a new registration statement relating to the securities offered therein,
and the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.

                                      II-3
<PAGE>
 
                                  SIGNATURES

     Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all for the
requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Mountain View, State of California, on the 12th day
of March, 1999.

                                       VERISIGN, INC.

                                       By: /s/ Stratton D. Sclavos
                                          ----------------------------------
                                          Stratton D. Sclavos
                                          President and Chief Executive Officer

                               POWER OF ATTORNEY

     KNOW ALL BY THESE PRESENTS that each individual whose signature appears
below constitutes and appoints Stratton D. Sclavos and Dana L. Evan, and each of
them, his attorneys-in-fact and agents, each with the power of substitution, for
him and in his name, place and stead, in any and all capacities, to sign any and
all amendments (including post-effective amendments) to this Registration
Statement, and to sign any registration statement for the same offering covered
by this Registration Statement that is to be effective upon filing pursuant to
Rule 462(b) promulgated under the Securities Act of 1933, and all post-effective
amendments thereto, and to file the same, with all exhibits thereto and all
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents or any of them, or his or their
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
dates indicated.

<TABLE>
<CAPTION>
Signature                                    Title                       Date
- ---------                                    -----                       ----         
<S>                              <C>                                 <C>
Principal Executive Officer:

/s/ Stratton D. Sclavos          President, Chief Executive Officer   March 12, 1999
- -------------------------------  and Director
Stratton D. Sclavos             

Principal Financial and
Principal Accounting Officer:

/s/ Dana L. Evan                 Vice President of Finance and        March 12, 1999
- -------------------------------  Administration and Chief
Dana L. Evan                     Financial Officer       
                                 
Directors:

/s/ D. James Bidzos              Chairman of the Board                March 12, 1999
- -------------------------------
D. James Bidzos

/s/ William Chenevich            Director                             March 12, 1999
- -------------------------------
William Chenevich

/s/ Kevin R. Compton             Director                             March 12, 1999
- -------------------------------
Kevin R. Compton

/s/ David J. Cowan               Director                             March 12, 1999
- -------------------------------
David J. Cowan

/s/ Timothy Tomlinson            Director                             March 12, 1999
- -------------------------------
Timothy Tomlinson
</TABLE>

                                      II-4
<PAGE>
 
                                 EXHIBIT INDEX

 Exhibit
 Number             Exhibit Title
 ------             -------------
   2.01   Agreement and Plan of Reorganization dated as of July 6, 1998 by and
          between Registrant, VeriSign Merger Corp., SecureIT and the
          shareholders of SecureIT.(1)

   3.01   Third Amended and Restated Certificate of Incorporation of the
          Registrant.(2)

   3.02   Amended and Restated Bylaws of Registrant.(2)

   4.01   Registration Rights Agreement dated as of July 6, 1998 by and between
          Registrant and the former shareholders of SecureIT.(3)

   4.02   Form of Specimen Common Stock Certificate.(2)

   5.01   Opinion of Fenwick & West LLP regarding legality of the securities
          being registered.

  23.01   Consent of Fenwick & West LLP (included in Exhibit 5.01).

  23.02   Consent of KPMG LLP, Independent Auditors.

  24.01   Power of Attorney (see Page II-4).

- ------------------ 

(1)  Previously filed as an exhibit to the Registrant's Current Report on Form 
     8-K filed on July 21, 1998 and incorporated herein by reference.

(2)  Previously filed with the Commission as an exhibit to the Registrant's
     Registration Statement on Form S-1 (File Number 333-49789) and incorporated
     herein by reference.

(3)  Previously filed with the Commission as an exhibit to the Registrant's
     Registration Statement on Form S-8 (File No. 333-58583).

<PAGE>
 
                                                                    EXHIBIT 5.01
                                                                    ------------
                                                                                

                                 March 11, 1999

VeriSign, Inc.
1390 Shorebird Way
Mountain View, CA 94043-1337


Gentlemen/Ladies:

     At your request, we have examined the Registration Statement on Form S-3
(the "Registration Statement") to be filed by you with the Securities and
Exchange Commission (the "Commission") on or about March 11, 1999 in connection
with the registration under the Securities Act of 1933, as amended, of an 
aggregate of 45,000 shares of your common stock (the "Stock"), all of which are
presently issued and outstanding and will be sold by a certain selling 
stockholder (the "Selling Stockholder").

     In rendering this opinion, we have examined the following:

     (1)  your registration statement on Form S-1 (File Number 333-70121) filed
          with and declared effective by the Commission on January 26, 1999,
          together with the Exhibits filed as a part thereof;

     (2)  your registration statement on Form S-1 (File Number 333-40789) filed
          with and declared effective by the Commission on January 29, 1998,
          together with the Exhibits filed as a part thereof;

     (3)  your registration statement on Form 8-A (File Number 000-23593) filed
          with the Commission on January 5, 1998;

     (4)  the Registration Statement, together with the Exhibits filed as a part
          thereof;

     (5)  the Prospectuses prepared in connection with the Registration
          Statement;

     (6)  the minutes of meetings and actions by written consent of the
          stockholders and Board of Directors that are contained in your minute
          books that are in our possession;

     (7)  your stock records that you have provided to us (consisting of a
          certificate from your transfer agent verifying the number of your
          issued and outstanding shares of capital stock as of March 1, 1999,
          and a list of option and warrant holders respecting your capital and
          of any rights to purchase capital stock that was prepared by you and
          dated March 3, 1999, verifying the number of such issued and
          outstanding securities);

     (8)  a Management Certificate addressed to us and dated of even date
          herewith executed by the Company containing certain factual and other
          representations;

     (9)  the various stock purchase and other agreements under which the
          Selling Stockholder acquired the Stock to be sold by them as described
          in the Registration Statement; and

     (10) a Selling Stockholder Questionnaire dated March 2, 1999 signed by the 
          selling stockholder.
<PAGE>
 
     By telephone call to the offices of the Commission, we have also confirmed
the continued effectiveness of the Company's registration under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and the timely filing by
you of all reports required to be filed by you pursuant to Rules 13, 14 and 15
promulgated under the Exchange Act.

     In our examination of documents for purposes of this opinion, we have
assumed, and express no opinion as to, the genuineness of all signatures on
original documents, the authenticity and completeness of all documents submitted
to us as originals, the conformity to originals and completeness of all
documents submitted to us as copies, the legal capacity of all natural persons
executing the same, the lack of any undisclosed terminations, modifications,
waivers or amendments to any documents reviewed by us and the due authorization,
execution and delivery of all documents where due authorization, execution and
delivery are prerequisites to the effectiveness thereof.

     As to matters of fact relevant to this opinion, we have relied solely upon
our examination of the documents referred to above and have assumed the current
accuracy and completeness of the information obtained from public officials and
records referred to above.  We have made no independent investigation or other
attempt to verify the accuracy of any of such information or to determine the
existence or non-existence of any other factual matters; however, we are not
                                                         -------            
aware of any facts that would cause us to believe that the opinion expressed
herein is not accurate.

     We are admitted to practice law in the State of California, and we express
no opinion herein with respect to the application or effect of the laws of any
jurisdiction other than the existing laws of the United States of America and
the State of California and (without reference to case law or secondary sources)
the existing Delaware General Corporation Law.

     Based upon the foregoing, it is our opinion that the 45,000 shares of Stock
to be sold by the Selling Stockholder pursuant to the Registration Statement are
legally issued, fully paid and nonassessable.

     We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to all references to us, if any, in the
Registration Statement, the Prospectus constituting a part thereof and any
amendments thereto.

     This opinion speaks only as of its date and we assume no obligation to
update this opinion should circumstances change after the date hereof.  This
opinion is intended solely for the your use as an exhibit to the Registration
Statement for the purpose of the above sale of the Stock and is not to be relied
upon for any other purpose.

                                      Very truly yours,

                                      FENWICK & WEST LLP

                                      By:   /s/ Jeffrey Vetter
                                         ------------------------------
                                            Jeffrey Vetter, a Partner

                                       2

<PAGE>
 
                                                                   Exhibit 23.02

                        CONSENT OF INDEPENDENT AUDITORS

The Board of Directors
VeriSign, Inc.:

We consent to incorporation by reference in the registration statement dated on 
or about March 11, 1999, on Form S-3 of VeriSign, Inc. of our report dated
January 15, 1999, with respect to the consolidated balance sheets of VeriSign,
Inc. and subsidiaries as of December 31, 1998 and 1997, and the related
consolidated statements of operations, stockholders' equity, and cash flows for
each of the years in the three-year period ended December 31, 1998, which report
appears in the December 31, 1998, annual report on Form 10-K of VeriSign, Inc.,
and to the reference to our firm under the heading "Experts" in the prospectus.

/s/ KPMG LLP

Mountain View, California
March 11, 1999


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